Our septic tank is on a bank, the tank itself sticks out and looks bloody awful. Pure garden was very neglected when we bought it, and I've been battling the brambles and nettles around it constantly.
I would like to plant something to hide it, it's west-facing so gets the evening sun as it spends most of the day in the house's shadow.
I was thinking something that can hold its own, like a buddleia would be nice below it as a screen.
I also need something that ideally would climb and spread over the bank (a nice version of brambles!). It can be something quite aggressive as the bank is separate from the rest of the garden so quite easy to contain.
The bank is quite steep and stoney. It would be nice if things had a pleasant scent too 
All help gratefully received